For pillowcase back, cut two 13-by-16 3/4-inch rectangles of fabric. Hem one long side of each. Lay photo fabric right side up. Then lay plain pieces, wrong sides up, on the printed fabric so that hemmed ends overlap. Machine-sew perimeter with 1/2-inch seam allowance.

Turn right side out, and slip over a 16-inch square pillow insert, available at home stores.